If she threw it away, it is not stealing. It is much like that saying "one man's junk is another man's treasure" (Please don't take that in a sexual manner).
If her bin is just above the area she kept it, then you didn't steal it, but you did take it when she wasn't done with it. Perhaps it droped in there?
It didn't drop in there, she said she'd thrown it away but that I should have told her there was still product in it. I see her point but accusing me of stealing is going a little far, and really, why should I? As she'd thrown it out anyway!
*cuts ass off and puts it in a treasure chest* *every one stares at me* me:ummmmm? one mans junk is another mans treasure? *every one laughs as a man steals the treasure chest* man:WOOT TREASURE!
If her bin is just above the area she kept it, then you didn't steal it, but you did take it when she wasn't done with it. Perhaps it droped in there?